Jamie and Adam built a toast-tossing machine and threw about 50 slices of each type of toast — unbuttered and buttered — then compared the results. Like flipping a coin, the dry toast landed an almost even number of times on both sides, and the buttered toast behaved about the same. With 29 of 48 buttery slices plopping buttered-side up, the breakfast myth was busted.

But whether the Romans were right about butter-side down being a bad omen remains up in the air.